Stencil hand stamp



Jan. 20, 1931. c. B. HARTS 1,

' STENCIL HAND STAMP Filed April 8, 1929 WITNESS Patented Jan.-- 20,1931 1 7UNITED STATES CLEMENT B. uns r Yonx, 1y. Y., ASSIGNOR T ROBERT,UNBAR, CLEMENT 7 1B. nAnrs, AND EDNA. x. rnnnrss, ALL or NEW YORK, N. Y.

STENCIL HAND STAMP Application filed April 8, 1929. seria to. 353,572.

vof a'type in'which-an inking body and sten- .to the stencil body.

oil are stretched over the foraminous bot- 'tomwall of a hollowstampbody in which stencil ink is placed. 7

"The present improvements relate firstto an improved form of inking padwhich adaptsrthe hand stamp for making stencil impressions upon rough orirregular surfaces, thepad being made of a highlyresilient -completely'porous material such as some forms of high-grade sponge rubber, andbeing shaped witha central thickened portion which is gradually reducedinthicknesstoward'itsedges by which thepad is secured Any ordinary sheetstencil-of the proper size may. be employed wish the improved porousresilient inking The second feature of the invention is the improvedtension device'for effectively attaching the inking pad and stencilsheet to the body of the hand stamp. This improved tension devicecomprises'a bar with means for engaging the edges of the pad and"stencil sheet with means for pivotally mounting it for-securing it inposition after the pad and ,r tencil sheet have been properly tensioned7 0r stretched. t

In order that the invention may be fully understod, it will first bedescribed with reference to the accompanying drawings and afterwardsmore particularly pointed out in the annexed claims. v

'In said drawings: Figure 1 is a'vertical transverse sectional view'of astencil, hand stamp illustrating the improved resilient. porous inkingpad;

Figure 2 is an improved perspective 'View of the improved ink padremoved from the stencil hand stamp; 1

ing the tension bar in tensioning position 1' Figure, a' detail endelevation illus Figure'3 is a detailperspective view illuse trating theimproved pivotally" mounted: tension bar; for the inking pad andstencilsheet, showing one form of device for securfreedom of movement.

trating the improved device in active position;

Figure 5 is a detail perspective view showing a slight modification ofmeansfor iat-cfl in the name of 7.0. Gorr-under date of October 20,1928, Serial No.313,814. This is a The; construction of the stencilhand" i preferably of substantially the form' illusthe form of stencilhand stamp to whichthe the purpose of illustrating the present inven-,tlOIl. 3. i 1 v The hollow body of the improved stencil hand stampisformed of a top plate l having the integral downwardly presented sideflanges 2 extending at right angles to the top plate' and tofwhichtheopposite edges of the segmental cylindrical bottom wall 3 are presentimprovements have beenapplied for brazed or soldered. The bottom wall 3is closely perforated throughout the greater,

part of its area. The hollow body is completed by the two endwallsections 4 which are brazed or soldered to the fiangedtop vplate 1and-the foraminous bottomwall 3. at its ends upon the stamp body andmeans The top wall lhas a relatively large cen? tral rectangularopening5 cut throughit, in d which closelyfits a removable cover plate 6resting preferably upon a flange orstop plate 1 1 and projectingslightly within the cover opening 5 to provide a ledge forthe support ofthe cover plate '6. The cover plate 6 has 7 secured to the inner surfaceof thetop plate by means of a bolt or screw. 9 inserted from i 10 whichis keyed or otherwise fastened to .the bolt'or screw 9 so as to rotateupon. the cover plate 6 with the handle 8. 'Spacing washers'11 and '12are mounted between the Q locking bar 10 andlcover plate and between 1the, handle 8 andcover plate forlthe purpose I of giving the handle andlocking barmore 'Returningto consideration I the-stencil hand stamp, itwill be obse-rved,

thatone the longitudinal side walls 2 is provided with outwardlyprojecting headed beneath and passing through a locking bar of the bodyof the stencilcan'ibemounted upon theseiheaded'l- 1 pins" or lugs, the'ste'ncilbeing superposed 3 upon the pad.

' headed guide pins over which fit the perforations' 36 of the angulartensiorrf'bar"37ii" Projectingfrom theside ofr the angle-bar 37.

pinslor, lugs30 above referred to.

I have 5' foundiitato be very diflicult if not impossible' to produce?a: satisfactory j stencil v d i printxuponrough;surfaceswith thestencilhand stamps heretofore in use; Inexperimenti'rigupon: this: problem witha view-v; to

providing: angefiec tive' stencil hand stamp that sccan be-1used v for;m'arking; packages wwhether ingwoodenror'p'asteboard :cratesvor in;

a 7 gunny-sack wrappings;Ihtwefoundthat satfisfa'ctoryiresults cani beproduced by employing a special-lyiformed inkingzpadof unusual Jthickness-madeof'a finesponge rubber which? iprovides' complete porosityfor the rapid capillaryispreadof inkfromthe stampbody}.=-

, padi'is illustrate indicated. at76; which are perforate to a: 1'6-CGiVGr-thQ headed: pins upon; the. stamp bodyf byrw-hieh it is securely?held invplace. This d inkingrpad' must be; of: high "resiliency;to-ac--pressingiall parts ofthe stencil sheet ,into the curately conform to:rough 1 surfaces; evenly irregularities upon the:- surface upon 1 whichthe-.r'irnprintris madezl Added :to this high -de'tf. gitee of:elasticitysthe; inking pad must 1 also have a (high: degree: of:porosity" so that the i manyicapillary channels will rapidly'spreadtherstencilling: to V all parts l of the' stencil design and"v continueto supply theaneoessary in-k-K'as rapidlycas necessaryjlfor successiveimprints; The: side; edges of; the-improved; 'c inking pad'sa re,ipreferably :formed with-:closed1-. 01*- ti'ghtskin surfaces to avoidthe objection-= U able spread of inkfto thejside edges of the pad-1* i 1Referringato Figuresii and-of the draw-i cm i ow m iotm f tinousbottornwall; said-Pad being forinedlof V S1011?bar;8O.2,hav1ng:;1nwardly bent" ends: .8 11" Y c. a .whicharepivotallyinountedz at 82 to theends}v 1 W orta; steneilihand stamp,the'topjand c side wall fof-the stanipbo lily-being preferably curvednsJ1 1 shown at '83 concentricallyiwith the pivot 8; v i

rte-p ams the readylmovementof the baF'SOFundervpreSsure oftheoperatorshands;

mustan s-n bar8O carrieskfour headd' pinso 5 a lag's sjy with i hienne-iperfmtedleage of;

the opposite si de of the st-en'cil body, tlie topplate 1l1as-projecting up' froin it two are the four spaced headedpi'ns' orlug'ses corresponding'iin positionvand spacing to the 85 0f bar-8;tlieopera'tor presses upwardly upon the tensionbar to properly spreadthe pad andstencil sheet over the foraminous bottom walltof the stampand when properly spreadis mafia stretchingposition by turn- 'v ing:thescrew 86; intoengagement with. the tl1readed-'opening= 88. f i 1; Inthe modification shown in 1 Figure: 5 *the- 7 construction is the sameexcepting the ten sionabar indicated at 80a is -provided?with a;perforation 87 b in the integraljear' 87a which:

'fits over and locks .upon headedpin 89 pro 'jecting'upirom thestampbody ffl lowbodyh'aving aicurved foraminous bottom wall and-pad securingmeans, with ani inking pa'dl extending over said foraminous bottomwall,saidlpad being-formedofi a .relaj-. v ctive'lygthick highly resilient"and-porous ma I i terialaand: a stencil sheetsuperposedaupon,Imthe'drawin sfesuch an; improved inking; Y 2' d at '75, itbeing; notedthat; T thisrp'ad has its greatest thickness in its lcen f g'tmlx-zonevfrom which it g-r'adual-ly" reduces ;in Y thickness: toe the1 reinforced attaching agedges;

saidiink-in'g pad; V

tom wall and pad and stencil'securing means 10"0:

with an inking." pad I extending over said vfor'aminous bottonr ,wallgsaidipad', being;

formedcof a; highly; resilientfand porous :ma-r terialof g :greatest:thickness in its centralv longitudinal zone; and gradually, reduoed'ina.thickness' toward its side edges, and a-stencil' sheet superposeduponsaid inking pad; 7

3. A- steneil-hand'stamp comprising a llOllowbody, having a foraminousIbQttOm' wall andipadxsecuring means with :an inkingggpad 10 extendingover said foraminous bottom wall saidrpadIbeing formed of aihighlyresilient and porous-sponge rubber having itsj'greate'st; thicknessinits central longitudinal zoneandw i of gradually reducedthicknesstoward, its 11'?!" side edges.

. 4:.A' stenc1l'hand jsta i np low body; havinga curved foraminousbottom Wall and pad and stencil securingnneans with. an ink ng;pad-extend ng over, said forams a highlyj resilient"and porous spongerubber fof great thicknessinits central longitudinal V zone andgradually reducedllin thickness to ward its; side edges, means"uponftli'e i'pfadf to i ga e t bs i r ns mean t r u y an stencil sheet"superposed upon said padi 7 "5i Infaf lstencil"hand stainpg the combinwtion with a' liollow bodyhaving afor-aminous' bottom walli'shfeetengaging-means *at;-one i edge of said bottom wall; and an adjnstabletension plate pivotally' mounted adjacent to the opposite edge of saidbottom wall, said P tension plate having means for'engaging a sheet andmeans for'locking it in position" upon the hand stamp; I Y

6. In a stencil .hand stamp the combination with a hollowbody having aforaminous bottom wall, sheet engaging lugs upon one side of said body,a tension bale carrying sheet engaging lugs and formed with in: i wardlypresented arms which are pivotally 1 mounted upon the edge of-saidhollow body; opposite said first-"named lugs and means" of engagementbetween said tension bale and I said body,

CLELENT B.- HARTS.

